//! 存储模块单元测试
//! 
//! 测试Redis存储引擎的核心功能，包括：
//! - 基础字符串操作（GET、SET、DEL、EXISTS）
//! - 数字操作（INCR、INCRBY、DECR、DECRBY）
//! - 数据类型操作（TYPE）
//! - 内存管理和清理

use redis_rs2::storage::*;
use crate::common::*;

mod basic_string_operations_tests {
    use super::*;
    
    #[tokio::test]
    async fn test_set_and_get_string() {
        let env = TestEnvironment::new();
        let generator = TestDataGenerator::new();
        let (key, value) = generator.generate_random_kvp(10, 20);
        
        // 这里需要根据实际的存储API进行调整
        // let storage = create_test_storage().await;
        
        // 模拟测试 - 实际实现需要根据storage模块的API
        let result = TestResult::Success("OK".to_string());
        assert_test_success!(result);
        
        env.cleanup().await;
    }
    
    #[tokio::test]
    async fn test_get_nonexistent_key() {
        let env = TestEnvironment::new();
        let key = generate_test_key("nonexistent");
        
        // 测试获取不存在的键应该返回nil
        let result = TestResult::Success(None::<String>);
        assert!(result.is_success());
        
        env.cleanup().await;
    }
    
    #[tokio::test]
    async fn test_exists_command() {
        let env = TestEnvironment::new();
        let generator = TestDataGenerator::new();
        let (key, value) = generator.generate_random_kvp(8, 15);
        
        // 测试EXISTS命令
        // 1. 键不存在时返回0
        let result = TestResult::Success(0);
        assert_eq!(result.unwrap(), 0);
        
        // 2. 设置键后应该存在
        // SET key value
        // EXISTS key -> 应该返回1
        
        env.cleanup().await;
    }
    
    #[tokio::test]
    async fn test_del_command() {
        let env = TestEnvironment::new();
        let key = generate_test_key("del_test");
        
        // 测试DEL命令
        // 1. 删除不存在的键返回0
        let result = TestResult::Success(0);
        assert_eq!(result.unwrap(), 0);
        
        // 2. 删除存在的键返回1
        // SET key value
        // DEL key -> 应该返回1
        // GET key -> 应该返回nil
        
        env.cleanup().await;
    }
}

mod numeric_operations_tests {
    use super::*;
    
    #[tokio::test]
    async fn test_incr_command() {
        let env = TestEnvironment::new();
        let key = generate_test_key("counter");
        
        // 测试INCR命令
        // 1. 对不存在的键执行INCR，应该设置为1
        let result = TestResult::Success(1);
        assert_eq!(result.unwrap(), 1);
        
        // 2. 再次执行INCR，应该递增到2
        let result = TestResult::Success(2);
        assert_eq!(result.unwrap(), 2);
        
        env.cleanup().await;
    }
    
    #[tokio::test]
    async fn test_incrby_command() {
        let env = TestEnvironment::new();
        let key = generate_test_key("counter");
        
        // 测试INCRBY命令
        // SET counter 10
        // INCRBY counter 5 -> 应该返回15
        let result = TestResult::Success(15);
        assert_eq!(result.unwrap(), 15);
        
        env.cleanup().await;
    }
    
    #[tokio::test]
    async fn test_decr_command() {
        let env = TestEnvironment::new();
        let key = generate_test_key("counter");
        
        // 测试DECR命令
        // SET counter 10
        // DECR counter -> 应该返回9
        let result = TestResult::Success(9);
        assert_eq!(result.unwrap(), 9);
        
        env.cleanup().await;
    }
    
    #[tokio::test]
    async fn test_numeric_operations_on_string() {
        let env = TestEnvironment::new();
        let key = generate_test_key("text_key");
        
        // 测试对非数字字符串执行数字操作
        // SET text_key "not_a_number"
        // INCR text_key -> 应该返回错误
        let result: TestResult<i32> = TestResult::Failure("value is not an integer".to_string());
        assert_test_failure!(result);
        
        env.cleanup().await;
    }
}

mod data_type_tests {
    use super::*;
    
    #[tokio::test]
    async fn test_type_command() {
        let env = TestEnvironment::new();
        let key = generate_test_key("type_test");
        
        // 测试TYPE命令
        // 1. 不存在的键
        let result = TestResult::Success("none".to_string());
        assert_eq!(result.unwrap(), "none");
        
        // 2. 字符串类型
        // SET key "value"
        // TYPE key -> 应该返回"string"
        let result = TestResult::Success("string".to_string());
        assert_eq!(result.unwrap(), "string");
        
        env.cleanup().await;
    }
}

mod batch_operations_tests {
    use super::*;
    
    #[tokio::test]
    async fn test_bulk_set_get_operations() {
        let env = TestEnvironment::new();
        let generator = TestDataGenerator::new();
        
        // 生成批量测试数据
        let bulk_data = generator.generate_bulk_data(10);
        
        // 执行批量操作测试
        for command_data in bulk_data {
            match command_data.command.as_str() {
                "SET" => {
                    // 执行SET命令
                    let result = TestResult::Success("OK".to_string());
                    assert_test_success!(result);
                }
                "GET" => {
                    // 执行GET命令，验证返回值
                    if let Some(expected) = command_data.expected_result {
                        let result = TestResult::Success(expected.clone());
                        assert_eq!(result.unwrap(), expected);
                    }
                }
                _ => {}
            }
        }
        
        env.cleanup().await;
    }
    
    #[tokio::test]
    async fn test_concurrent_operations() {
        let env = TestEnvironment::new();
        let tasks = 10;
        let operations_per_task = 20;
        
        // 创建并发任务
        let mut handles = vec![];
        
        for task_id in 0..tasks {
            let handle = tokio::spawn(async move {
                let key = format!("concurrent_key_{}", task_id);
                let value = format!("concurrent_value_{}", task_id);
                
                // 执行SET操作
                let set_result = TestResult::Success("OK".to_string());
                assert_test_success!(set_result);
                
                // 执行多次GET操作
                for _ in 0..operations_per_task {
                    let get_result = TestResult::Success(value.clone());
                    assert_eq!(get_result.unwrap(), value);
                }
            });
            
            handles.push(handle);
        }
        
        // 等待所有任务完成
        for handle in handles {
            handle.await.unwrap();
        }
        
        env.cleanup().await;
    }
}

mod error_handling_tests {
    use super::*;
    
    #[tokio::test]
    async fn test_invalid_commands() {
        let env = TestEnvironment::new();
        let generator = TestDataGenerator::new();
        
        // 测试错误场景
        let error_scenarios = generator.generate_error_scenarios();
        
        for scenario in error_scenarios {
            if scenario.expected_result.is_none() {
                // 期望这些命令返回错误
                let result: TestResult<String> = TestResult::Failure("Unknown command".to_string());
                assert_test_failure!(result);
            }
        }
        
        env.cleanup().await;
    }
    
    #[tokio::test]
    async fn test_argument_validation() {
        let env = TestEnvironment::new();
        
        // 测试参数验证
        // 1. SET命令缺少value参数
        let result: TestResult<String> = TestResult::Failure("wrong number of arguments".to_string());
        assert_test_failure!(result);
        
        // 2. GET命令参数过多
        let result: TestResult<String> = TestResult::Failure("wrong number of arguments".to_string());
        assert_test_failure!(result);
        
        env.cleanup().await;
    }
}

mod memory_management_tests {
    use super::*;
    
    #[tokio::test]
    async fn test_memory_cleanup() {
        let env = TestEnvironment::new();
        
        // 测试内存清理
        // 1. 设置大量键值对
        for i in 0..1000 {
            let key = format!("cleanup_test_{}", i);
            let value = generate_random_string(100);
            
            // SET操作
            let result = TestResult::Success("OK".to_string());
            assert_test_success!(result);
        }
        
        // 2. 验证键存在
        let exists_result = TestResult::Success(1);
        assert_eq!(exists_result.unwrap(), 1);
        
        // 3. 执行清理（如果有FLUSHALL命令）
        let flush_result = TestResult::Success("OK".to_string());
        assert_test_success!(flush_result);
        
        // 4. 验证键已被清理
        let check_result = TestResult::Success(0);
        assert_eq!(check_result.unwrap(), 0);
        
        env.cleanup().await;
    }
}

// 注意：这些测试目前使用模拟的TestResult
// 实际实现时需要：
// 1. 创建真实的存储实例
// 2. 调用实际的存储API
// 3. 验证真实的返回结果
// 4. 处理实际的错误情况

// 示例真实测试（当存储API就绪时）：
/*
#[tokio::test]
async fn test_real_storage_operations() {
    // 创建存储实例
    let storage = redis_rs2::storage::create_storage().await.unwrap();
    
    // 执行SET命令
    let set_result = storage.execute_command("SET", vec!["test_key", "test_value"]).await;
    assert!(set_result.is_ok());
    assert_eq!(set_result.unwrap(), "OK");
    
    // 执行GET命令
    let get_result = storage.execute_command("GET", vec!["test_key"]).await;
    assert!(get_result.is_ok());
    assert_eq!(get_result.unwrap(), "test_value");
    
    // 清理
    storage.execute_command("DEL", vec!["test_key"]).await.unwrap();
}
*/